Combined stop and drain valve.



C. WALKER.

COMBINED STOP AND DRAIN VALVE.

APPLIGATI N FILED APILM, 1912.

1,053,075. 7 Patented Feb. 11, 1913.

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G. WALKER.

COMBINED STOP AND DRAIN VALVE.

APPLICATION FILED APR. 24, 1912.

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Patented Feb. 11, 1913.

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C. WALKER.

COMBINED STOP AND DRAIN VALVE.

APPLICATION FILED APILZIL, 1912 -v 1,053,075, Patented Feb. 11,-1 913.

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CHARLES WALKER, 0F KNOXVILLE, TENNESSEE.

COMBINED STOP AND DRAIN VALVE.

Specification of Letters Patent.

Patented Feb. 11, 1913.

Application filed April 24, 1912. Serial No. 692,894.

To all whom it may concern Be it known that 1, CHARLES WALKER, a citizenof the United States, residing at Knoxville, in the county of Knox andState of Tennessee, have invented new and useful Improvements inCombined Stop and Drain Valves, of which the following is aspecification.

This invention relates to improvements in combined compression stop anddrain valves, of that type wherein two Valve bodies are employed, theone controlling the circulation passages and the other controlling thedrainage opening or openings.

The principal object of the present invention is to provide a valve ofthe class described in which the valve bodies are so constructed andcoordinated that the access of water from the inlet opening to thedrainage openings will be positively prevented. In carrying out thisobject, the invention provides for the complete and secure closure ofthe water inlet passage before the drain openings are uncovered and atthe same time for the operative connection of the valve bodies aforesaidin such manner that one will be operated from the other in an especiallyfacile manner and without any undue wear of the main valve. Embodimentsof the invention are illustrated in the accompanying drawings, in which:

Figure 1 is a central vertical sectional view of a valve construction inwhich the features of the invention are incorporated; Fig. 2 is ahorizontal sectional view on the line 2-2 of Fig. 1; Fig. 3 is a viewshowing an alternative detail of construction pertaining to the valvebody which controls the circulation passages; Fig. 4 is a hori-' zontalsectional view on the line 4-4 of Fig. 1; Fig. 5 is a view similar toFig. 1 but showing a modified or alternative construction; Fig. 6 is ahorizontal sectional view on the line 6-6 of Fig. 5; Fig. 7 is a viewsimilar to Fig. 1 but showing a further modified or alternativeconstruction; Fig. 8 is a horizontal sectional view on the line 8-8 ofFig. 7 and Fig. 9 is a detail sectional view on the line 99 of Fig. 8.

Similar characters of reference designate corresponding parts throughoutthe several views.

The operating parts are inclosed in a valve casing 1 which has the inletconnection 2 and the outlet connection 3. In the embodiments shown, theconnection 2 communicates with a passage 4, which is formed by apartition 5 and the wall of the casing adjoining said partition, andwhich extends downwardly from the inlet connection 2, terminating in anupwardly directed valve seating discharge end 6.

In the constructions shown in Figs. 1 to 6, the connections 2 and 3 arelocated opposite one another and the openings for drainage purposes arelocated in the bottom wall of the casing 1. These openings are shown at7, and are preferably sufiicient to provide an air vent, a force tubeconnection and a connection for the trapped pipes of the system, asexplained in my prior U. S. Patent No. 965,129'of July 19, 1910.However, the number of drainage openings is unimportant, so far as thepresent invention is concorned; and if desired, but a single opening fordrainage purposes may be provided.

The discharge end 6 of the passage 4 is controlled by a valve designatedgenerally by the numeral 8, and the drainage openings 7 are controlledby a valve designated generally by thenumeral 9. ThevalveS includesastem10 which is threaded through a closure and packing head 11 at the upperend of the casing 1 and on its projecting outer end portion may carryorbe connected to an operating handle 12. The stem 10 carries at its lowerend an axial valve projection 13 of a diameter but very slightly lessthan the diameter of the discharge end 6 of the passage 3, and which isdesigned to pass axially into said passage. Above the projection 13 avalve washer 14 is arranged, the oflice of which is to seat upon theannular face of the discharge passage 6 and act in connection with thevalve projection 13 in corn-v pletely cutting off the flow of water fromthe passage 4. The washer 14 is forcibly held in seated relation by anexpansive coil spring 15 which surrounds the stem 10, having an endsecured thereto and an end which bears against a follower 16, alsosurrounding the stem 10 and arranged above the washer 14. It is desiredthat the washer 14 should remain seated even during a portion of theupward movement of the stem 10 and for this purpose, the follower 16 isslidable on the stem 10, its downward movement being limited by ashoulder 17 on the projection 13. The follower 16 preferably comprises apair of members which are connected by threads, the object being toadjust the height of the follower and thereby regulate the tension ofthe spring 15. The Washer 14 is preferably inclosed within an angularfiange-like extension 18 of the follower 16. In the construction shownin Fig. 1, the valve projection 13 is designed to be wholly retractedfrom the dlscharge opening 6. In Fig. 3, however, a valve projection isshown which need not be wlthdrawn from the passage 6, being providedwith an annular row of openings 19 through which the water passes fromthe inlet passage 4, and being of substantially greater depth than. theprojection 13 shown 1n Fi 1.

- The valve 9 includes a stem 20 which, in the embodiment shown in Figs.1 to 6, is parallel to the stem 10 of the valve 8. The stem 20 carriesat its lower end a valve disk 21 and a follower 22 which is urgedagainst the disk by an expansive coil spring 23. The disk 21 and thefollower 22 are mounted loosely on an axially projecting retaining pin24, which is secured in the lower end of the stem 20, and the spring 23is seated in a recess in a horizontal web 25 which extends across thecasing above the discharge end 6 of the passage 4, and serves as a guidefor the follower 16 and for the valve stem 20. The web 25 is providedwith a suitable number of openings 26 through which water may circulatefrom the portion of the casing at one side of said web, to the portionof the casing at the otherside of said web.

In the embodiment'shown in Fig. 1, the valve stem 20 is held againstturning move- 'ment by a lug 27 at the upper end thereof,

and which engages in a groove 28 formed in the casing, the upper portionof the stem 20 passing through a centering lug 29 which is formed withinthe casing. The valves 8 and 9 are put into operative relation by theprovision of a lug 30 which projects laterally from the stem 20 andworks in a spiral groove 31, defined by a projecting spiral rib 32formed on the stem 10. The pitch of the rib 32, and consequently, of thegroove 31, is considerably greater than the pitch of the threads on theupper portion of the stem 10, and which work through the head 11, inorder that, during the downward movement of the stem 10 the rib 32 andthe groove 31 may effect an upward movement of the stem 20.

The lug 30, the groove 31, and the rib 32 are to be regarded simply asone means of coordinating the valves 8 and 9. Various other means may beemployed, some of which are herein illustrated, and will now be referredto. Thus, in Fig. 5, the construction of the valve is generally the sameas in Fig. 1, differing, however, as to the manner of relating thevalves 8 and 9. In this latter construction, the upper portion of thestem 20 is pivotally connected to the forked end the tension of saidspring by a spiral cam 37 provided on the stem 10 to engage the portion34 of the lever 33 which surrounds said stem.

The construction shown in Figs. 7 to 9 proceeds on the same principlesas the constructions already described, but differs substantially as tothe arrangement of the parts. In this case, the drainage opening oropenings, instead of being formed in the base of the casing 1, as in thepreceding examples, are formed in a side thereof and between theconnections 2 and 3. The passage 4, with its upturned discharge end 6,is controlled by a valve 8 which may be of the same construction as thevalve 8 referred to in connection with Fig. l, and the drainage openingsare controlled by a valve which is designated generally by the character9 and corresponds to the valve 9 in the preceding examples. The valve 9includes a valve washer 45 which is mounted on a sliding frame 46. Theframe 46 surrounds the stem of the valve 8 and is movable transverse tothe casing 1, being supported by ledges 47 arranged adjacent theconnections 2 and 3. bcrews 48 are threaded into the ledges 47, theirheads overlying the sides of the frame- 47 and preventing any upwarddisplacement of said frame. The valve disk 45 is urged to closedposition, for example, by a leaf spring 49, the ends of which may besuitably secured to the ledges 47 and the central portion of whichengages an upstanding pin 50, provided on the frame 46. The stem 10 ofthe valve 8 in this instance carries a cam 51 which is shaped to movethe frame 46 1 against the tension of the spring 49, and whichpreferably engages an inwardly extending leg or rise 52 of the frame 46.The sides of the frame 46 are preferably straight and parallel, in orderthat they may be ef- 115 ficiently supported and guided by the ledges47.

All of the constructions above referred to operate on practically thesame principles connections between the stems of the valves 8 and 9 willquickly close the valve 9 before the projection 13 and the washer 14leave the valve seat 6. This action is secured by reason not only of thecharacter of the connections betweenthe valves 8 and 9, but by reason ofthe fact that the stem 10 of the valve 8 is permitted some degree ofupward movement during which the projection 13 still remains within thepassage 6, and before the shoulder 17 of said projection engages thefollower 16 to lift the valve washer 14 from the face of the dischargeterminal 6. Conversely, when the valve 8 is closed, the projection 13enters the discharge end 6 of the passage 4, and the washer 14 assumesits seat before the valve 9 is opened. In this way the passage of waterfrom the connection 2 to the drainage openings is absolutely prevented,yet at the same time, the proper sequence of operations of the valves 8and 9 is secured. The valve construction shown in Figs. 5 and 7 carryout the same sequence of operations, involving, as they do, the quickacting connections between the valves 8 and 9, and the peculiar relationof the valve stem 10 and its projection 13 to the discharge end 6 of thepassage 4, and to the valve washer 14.

The projection 13, regardless of the particular construction in which itmay be employed, preferably has a dished or concave under face 53(Fig. 1) which affords an annular relatively sharp edge that serves tocut away any deposit which may have accumulated in the discharge end 6of the passage 4. The accurate seating of the valve is thus greatlyfacilitated. The seating of the valve is, moreover, not substantiallyaffected by the water pressure, inasmuch as the projection 13 takes suchpressure from the valve washer 14, and enables the latter to be heldfirmly against the under face of the part 6, and under the pressure ofthe spring 15. If desired, the stem 10 of the valve 8 may carry aprojection 54 to engage the head 11, and limit the upward movement ofthe valve 8, or any other device suitable for the purpose may beemployed.

The valve construction herein described has the further advantage ofbeing compact and of being adaptable to various environments whereineconomy of space and an accurate relation of the operations involved arerequired.

It is to be understood that the constructions herein disclosed are to beregarded by way of example, rather than by way of enumeration.

Having fully described my invention, I claim:

1. In a compression stopand drain valve construction, a casing having aninlet connection and a drainage opening, a pair of valves for saidconnection and opening respectively, operative connections between thevalves, the valve which controls the drainage opening being operable toopen subsequent and to close prior to the corresponding closing andopening operations of the other valve, the latter comprehending amovable stem and spring'pressed valve means carried thereby andrelatively movable thereon, and a threaded connection between saidmovable stem and the head of the valve casing.

52. In a compression stop and drain valve construction, a casing havingan inlet connection and a drainage opening, a pair of valves for saidconnection and opening respectively, operative connections between thevalves, the valve which controls the drainage opening being operable toopen subsequent and to close prior to the corresponding closing andopening operations of the other valve, the latter comprehending amovable stem and spring pressed valve means carried thereby andrelatively movable thereon, the stem having a shouldered projectionbelow the valve means and adapted to work in the discharge end of theinlet connection, and a threadedconnection between said; movable stemand the head of the valve casing.

3. In a compression stop and drain valve construction, a casing havingan inlet connect-ion and a drainage opening, a pair of slidable valvesfor said connection and opening respectively, a cam-like elementassociated with one valve and a companion element associated with theother valve for engagement by said cam-like element, said elementsconstituting a means of connection between the valves whereby when thestop valve is opened and closed relatively quick prior closing andsubsequent opening operations of the drain valve will be ef fected, thevalve which controls the inlet connection comprising a movable stemthreaded through the head of the casing, and a spring-pressed valve bodymovable relatively on said stem.

4. In a compression stop and drain valve construction, a casing havingan inlet connection and a drainage opening, said connection and openingbeing located adjacent the lower end of the casing, a pair of parallelvalves for said connection and opening respectively, a quick actingoperative connection between the valves whereby the valve which controlsthe drainage opening is operable to open subsequent and to close priorto the corresponding closing and opening operations of the other valve,the latter comprehending a movable stem and spring pressed valve meanscarried thereby and relatively movable thereon, and a threadedconnection between'said movable stem and the head of the valve casing.

5. In a compression stop and drain valve construction, a casing havingan inlet connection and a drainage opening, said connection and openingbeing located adjacent the lower end of the casing, a pair of parallelvalves for said connection and opening respectively, the valve whichcontrols the connection including a threaded axially movableandrotatable stem and spring pressed valve means relatively movable inthe lower portion of said stem and a quick acting connection between thevalves comprising a spiral element on one of the valve witnesses.

CHARLES WALKER. Witnesses:

CHAS. W. PARKER, PARIS A. HAYNES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

